Slot forming machine



July 7, 1936. e. HAZELTON El AL SLOT FORMING MACHINE Original Filed Dec. 23, 1933 \NVENTOR Patented July 7, 1936 SLOT FORDHNG MACHINE George "Hazelton, Cyril Harry James, and William Isaac Bacon, Leicester, England, assignors to United Shoe Machinery Corporation, Paterson, N J., a corporation of New Jersey Original application De No. 703,730. Divided cember '19, 1934, Seri Britain Julyll, 1933 ceniber '23, '1933, Serial and this application Deal No. 758,164. 'In Great 5 Claims. (01.1242) This application relates to the manufacture so'frshoes an'diis illustrated as embodied in a ma- !chine Efor formingrslots in heels.

.In United .States Letters Patent No. 984,453,

=5 I'granted December 18, 1934 on an application filed in the names :of Bates et al., there is disclosed "an improved method of shoema'king in which 51-16818 built up from lifts are trimmed 'to shape =-and are preferably scoured before-attach- 10 :ment to the shoes. 'One method of attaching such h'eels'to shoes provided with short soles is :disclosed in United States Letters Patent No. 2,021,431, granted January 14; 1936, on an application filed in our names, of which this ap- 1'5 plication is a division, and comprises forming a bevel ait the rear-end of the sole-andcutting in the breast of :the heel a deep slot which is of isu'itab'le' shape to receive the rear end of the sale, the slot extending transversely of the heel :20 and hav'ing :one of its sides terminating substantially at the front edge of 'the attaching 'fac'e of the heel.

It is an object of this invention to 'provide a machine for quicllyand effectively forming slots '25 "such as above described in the breasts of heels.

With the above object in view, and in accordance viith a feature of' this "invention, the illustrated mac'hine is provided with a rotary barrel cutter, a supporting member constructed and 80 arranged to be engaged by the forward end of the attachingface of a heel, gages secured to the 'member and having heel-engaging faces respecti-vely'arranged to engage opposite sides of the heel thereby to positionthe same widthwise 35 of the -mrriber, and stops for positioning the heeI Iength-Wise of the member, the member being mounted for movement in a predetermined 'paith to movethe heel against the cutter there- 'by to 'form -in the breast of the heel a slot ex- 40 tending transversely of the breast and formed and-'arranged to receive the rear endof a short sole.

In 'the'drawing, V

"Fig. 1 is 'a side elevation with parts broken 4 away "inan illustrative machine for forming a sole-receiving slot in the breast of a heel;

Fig2 a plan viewof the machine the cutter of which is shown in section;

Fig. 3 is a sectional view of the machine taken alongline mIL-IIIof 'Fig. 1; and

Fig. is a perspective view of a heel which has :been slotted by the use of the above maohine.

' In theabove-mentioned United States Letters 55 lPatent No. 2,027,431, there is disclosed and claimedaheeil :20 which comprises a plurality of lifts 22 of leather or other suitable material rand is finished prior to being attached :to the :shoe. The illustrated machine is constructed and arranged quickly and efiectively to form in the breast 24 of the heel a slot-or groove 26shaped and arranged to receive the rear end of a short sole (not shown) in order to fit the heel to the shoe as disclosed in United States Letters Patent No. 2,027,431. The slot 26 is of V-shaped construction in accordance with the shape of the rear beveled end of the sole. The slot 26 is bowed upwardly to correspond to the curvature of the shank portion of the sole of the shoeand extends from-one side of the heel to the other. "The upper face of the slot 26 terminates substantially at the forwardedge 28 of the attaching' face 30 of the heel and forms therewith a wedge 32 which is positioned between the beveled endof the sole and the shoe upper, the :20 wedge 32 being compressed against the beveled :end of the sole during the heel-attaching op- :eration. Heel-attaching nails are driven through the beveled rear end of the sole positioned within the slot '26 while the heel 20 is 2-25 compressed against the shoe, a tight joint thus being formed between the heel and the sole. After the heel 20 has been attached to the shoe the marginal edge portions of the beveled rear end which project beyond the sides of the 30 heel are trimmed flush with the respective sides of the heel, the trimming cuts usually extending forwardly at the heel breast line in order to insure that the lateral edgesof the shank portion "of the sole shall merge attractively with the $35 sides of the heel. The joint between the heel and the shoe is finally operated upon by an abrasive tool in order to smooth the joint.

The slot 26 is formed by moving the heel .20 in ta predetermined-path against a rotary barrel 'cutter or saw '34 comprising a plurality of V- -shaped teeth 36 and mounted upon a rotatable .shaft v38 journalecl in suitable bearings (not shown). The teeth 36 of the cutter 34 extend (in the .general direction of the axis of rota- .tion of the .shaft 38 and are arranged in circumferentially spaced relation. Each of the teeth 36 .of the cutter 34 is tapered and has a shape similarto the cross section of the slot 26 to be formed. The teeth 36 are preferablyabout three-fourthsof an inch in length and are illustrated inclined at about 14 to the axis =0f rotation of the cutter '34. In order to position the heel 20 preparatory to moving the same in ia predetermined path, which is disposed in slide 50.

substantially parallel relation to the axis of ro-' tation of the shaft 38, the machine is provided with a heel support or table 40 mounted for reception within a T-shaped guideway 42 (Fig. 3) of a guide block 44.. The guide block 44 is secured to the top of a column 46 which is screwed to a bracket 48, the bracket in turn being screwed to a slide 50 mounted for vertical ad-,

of the gages 54 are inturned to form opposing extensions or stops arranged to engage the breast 24 of the heel 20 positioned widthwise upon the table 40.

The opposing faces 62 (Fig. 3) of the gages 54 are undercut in order to engage the top portions of the sides of theheel'. The table may have a convex member 64 secured thereto by screws 66 in order to engage a substantial portion of the attaching face of the heel, the convex member cooperating with the undercut sides 62 of the gages 54 rigidly to secure the heel to the table during the slot-forming operation.

end of the table .Movement of the table: 4B towardthe cutter '34 is limited by a nut 58 which is in threaded engagement with a rod i0 secured to the rear 40. The rod 10 passes through a recess 12 of an angle arm guide block 44 and as the table 40 is. moved to the right (Figs. 1 and 2) thenut 68 engages the angle arm I4. Rearward movement of the table 40 is limited by direct engagement of the table with the angle arm '74, the table being normally held away from the cutter 36 by a spring 16 the upper end of which is secured to the table 40 and the lower end of which is secured to the guide block 44. It will be noted that the forward inner portions of the gages 54 are cut away to provide arched portions 18 (Fig.l) to prevent the gages from engaging the cutter 36 as the table is moved toward the same in a direction parallel to the axis of rotation of the shaft 38. i I

in order to perform the slotting operation the operator places the heel 251 attaching face downwardly upon the table 48 between the centralizing gages 54' and moves the heel to the right (Figs. 1 and 2) until the breast 24 of the heel engages the projecting portions 5 9 of the gages 54 respectively. Continued movement of the heel 20 to theright causes the same and thetable 40 to slide as a unit in a rectilinear path along the guideway 42 of the guideblock 44 against the cutter 36 thereby to force the breast of the heel against the cutter. Movement of the table 40 to the right is limited by engagement of the stud 68 with the angle arm 14'. The table 'is then returned under pressure of the spring 15 to its retracted position, the heel then being removed from the table. The gages 54 maybe changed if desirable, in accordance with the shape of' the heel being slotted. The operating parts-of the 'machine may be enclosed within a casing (notshown) v,whichis preferably provided with a suction pipe and having heel-engaging faces 14 secured to the "supporting member constructed and arranged to be engaged by the forward end of the attaching face of a heel, gages secured to the member ranged to engage opposite sides of the mounted upon said member thereby to position the heel widthwise, and stops for positioning the heel lengthwise, said member being mounted m movement in a predetermined path to move the heel against the cutter thereby to form in the breastof the heel a slot extending transversely of the breast and formed and arranged to receive the rear end of a short sole.

2.;A machine for operating upon heels having, in combination, a rotary cutter, a table for engaging the attaching face of a heel, and gages secured to the table and having heelengaging faces arranged to engage the opposite sides respectively of the heel thereby to position the same widthwise, each of said gages comprising an extension constructed and arranged for engagement with the breast of the heel to position the same lengthwise of the table, said respectively arheel V table being mounted for movement under pressure of the heel to cause the heel to move against the cutter thereby to form in the breast of the heel a groove extending transversely of the breast of the heel in close proximity to the forward edge of the attaching face of theheel.

3. A machine for operating upon heels having, in combination, a rotary barrel saw, a table for supporting a heel, said table having a con vex surface constructed and arranged to be engaged by the forward portion of theattaching face of the ing the heel widthwise and lengthwise upon the table, said table being mounted for movement to present theheel, breast first against the saw thereby to form in the breast of the heel a slot which is positioned adjacent to the attaching face of the heel and is shaped to receive the rear end of the shank'portion of a sole.

4. A machine for operating upon heels having, in combination, a rotary barrel saw, a table for supporting a heel, said table having a convex surface constructed and arranged to be enheel, and gages for positiongaged by the forward portion of the attaching face' of the heel, gages mounted upon the table and having undercut heel-engaging faces arranged to engage opposite sides respectively of the heel mounted upon said table for position- 4 ing the heel widthwise, and stops for positioning the heel lengthwisesaid table being mounted for movement in a predetermined path to carry the heel, breast first against the cutter thereby to form in the breast of the heel a slot extending transversely jacent to. the front edge of the attaching face of the heel.

5. A machine for operating upon heels having,

of the heeland located ad- 4 in combination, a rotary barrel saw, a supporting heel widthwise, stops for positioning the heel 7 lengthwise, said member being mounted for movement in a predetermined path to carry the heel, breast first against the saw thereby to form in the breast of the heel a slot extending transversely across the heel and located adjacent to the front edge of the attaching face of the heel, and a. stop for limiting the movement of the member thereby to control the depth of the slot formed in the breast of the heel. GEORGE HAZELTON. CYRIL HARRY JAMES. WILLIAM ISAAC BACON. 

